modifying the original fix.
    As it turned out --fix-db-names option of the mysqlcheck suppress
    the --check_upgrade option, so we have to call the mysqlcheck twice
    from the mysql_upgrade.

per-file comments:
  client/mysql_upgrade.c
Bug#35934      mysql_upgrade calls mysqlcheck with insufficient parameters

The reason for the failures was bug #21205 (fixed in 6.0 by dtoa, but still present in 5.0/5.1).

binlog_row_mix_innodb_myisam resutls are corrected.
The last operations prior the dup error is
TRUNCATE table t2;
Therefore after
--error ER_DUP_ENTRY
INSERT INTO t2 select * from t1;
table t2 must be empty, and that is what the updated results confirm.

Extending bug#40221 regression test: 1. include INSERT 2. convert prim key + autoinc to
unique.

The problem appears often in conjuction with temp files, when temp-pool is used, so that names of temp files are not unique.

The reason is that rapid deletiion and creation of fiiles with the same name on Windows is not guaranteed to succeed. File disappears from the file system only when the last handle to it is closed. If for example  a virus scanner, a backup or indexing  application  opens the  temp file just before MySQL deletes it, the file will enter "delete pending" state. In this state,it is not possible to open the file , or create a file with the same name (CreateFile returns  ERROR_ACCESS_DENED, posix open returns EACESS)

Fix (rather a cheap workarounf) is not to use temp-pool when working with temporary files- this will make filenames unique. 
With this patch , temp- pool setting will be ignored on anything but Linux(the option only made sense for Linux since its invention anyway).

Uncommited changes are replicated and stay on slave after
rollback on master

Making test slightly more generic and robust.

                  
The problem here is that embedded server starts handle_thread manager 
thread  on mysql_library_init() does not stop it on mysql_library_end().
At shutdown, my_thread_global_end() waits for thread count to become 0,
but since we did not stop the thread it will give up after 5 seconds.
             
Solution is to move shutdown for handle_manager thread from kill_server()
(mysqld specific) to clean_up() that is used by both embedded and mysqld.
            
This patch also contains some refactorings - to avoid duplicate code,
start_handle_manager() and stop_handle_manager() functions are introduced.
Unused variables are eliminated. handle_manager does not rely on global
variable abort_loop anymore to stop (abort_loop is not set for embedded).
            
Note: Specifically on Windows and when using DBUG version of libmysqld, 
the complete solution requires removing obsolete code my_thread_init() 
from my_thread_var(). This has a side effect that a DBUG statement 
after my_thread_end() can cause thread counter to be incremented, and 
embedded will hang for some seconds. Or worse, my_thread_init() will 
crash if critical sections have been deleted by the global cleanup 
routine that runs in a different thread. 

This patch also fixes and revert prior changes for Bug#38293 
"Libmysqld crash in mysql_library_init if language file missing".

Root cause of the crash observed in Bug#38293  was bug in my_thread_init() 
described above

Bug #41173 rpl_packet fails sporadically on pushbuild: query 'DROP TABLE t1' failed


The both issues appeared to be a race between the SQL thread executing CREATE table t1
and the IO thread that is expected to stop at the consequent big size event.
The two events need serialization which is implemented.
The early bug required back-porting a part fixes for bug#38350 exclusively for 5.0 version.

after rollback on master

When starting a transaction with a statement containing changes
to both transactional tables and non-transactional tables, the
statement is considered as non-transactional and is therefore
written directly to the binary log. This behaviour was present
in 5.0, and has propagated to 5.1.

If a trigger containing a change of a non-transactional table is
added to a transactional table, any changes to the transactional
table is "tainted" as non-transactional.

This patch solves the problem by removing the existing "hack" that
allows non-transactional statements appearing first in a transaction
to be written directly to the binary log. Instead, anything inside
a transaction is treaded as part of the transaction and not written
to the binary log until the transaction is committed.

                    bigint' fails on windows.

Visual Studio does not take into account some x86 hardware limitations
which leads to incorrect results when converting large DOUBLE values
to BIGINT UNSIGNED ones.

Fixed by adding a workaround for double->ulonglong conversion on
Windows.

A transaction could result in having an extra event after a query that
errored e.g because of a dup key. Such a query is rolled back in
innodb, as specified, but has not been in binlog.
It appeares that the binlog engine did not always register for a query
(statement) because the previous query had not reset at its statement
commit time. Because of that fact there was no roll-back to the
trx_data->before_stmt_pos position and a the pending event of the
errorred query could become flushed to the binlog file.

Fixed with deploying the reset of trx_data->before_stmt_pos at the end
of the query processing.

There was a missing initialization.

with non-RSA-requesting client if server uses RSA key

matchSuite() may not find a match. 
It will return error in this case.
Added a error checking code that will prevent using uninitialized 
memory in the code based on the assumption 
that matchSuite() has found a match.